Hi, Questions, what a great friend you are thinking of how to help yours. Interesting idea to try and use little shocks. Sometimes trichotillomania can be helped with medicine or various types of psychotherapy, you might suggest your friend tell his parents, ask to see his doctor or a therapist for help if he doesn't want to try your idea or does but it doesn't help:

http://www.mayoclinic.com/health/tri...ents-and-drugs